: : MEL Group : : - Steam Boiler - Tubeless Steam Generator -

Model		MEL 150TL-100	MEL 250TL-100	MEL 350TL-100	MEL 350TL-150	MEL 500TL-100	MEL 500TL-150	MEL 650TL-150
Boiler Capacity F&A 100 C	Kg/hr	150	250	350	350	500	500	650
Maximum Working Pressure	Psi	100	100	100	150	100	150	150
Design Pressure	Psi	100	100	100	150	100	150	150
Heating Surface	Sq.m	4.6	6	6.98	6.95	8.06	8.04	13.74
Fuel Consumption Natural Gas	SCMH	10.6	17.6	24.6	24.8	35.2	35.5	46.1
Fuel Consumption Light Oil (HSD)	LPH	11	18	26	26	37	37	48
Volume of Water at NWL	Lit	174	191	207	205	278	275	465
Boiler Weight Dry	Kg	650	725	745	770	1050	1075	1725
Boiler Weight NWL	Kg	824	916	952	975	1328	1350	2190
Safety Valve	mm	25	25	25	25	40	40	40
Main Steam Valve	mm	25	25	40	40	40	40	50
Blow down Valve	mm	25	25	25	25	25	25	40
Chimney outlet	mm	200	200	200	200	250	250	300
Power Burner	Kw	0.15	0.25	0.25	0.25	0.25	0.25	0.25
Power Feed Water Pump	Kw	1.1	1.5	1.5	1.5	1.5	1.5	1.5
Dimension A	mm	950	950	975	975	1090	1090	1270
Dimension B	mm	1558	1680	1830	1830	1830	1830	2132
Dimension C	mm	1768	1889	2039	2039	2039	2039	2386
Dimension D	mm	1380	1380	1380	1380	1700	1700	2210
Dimension E	mm	1300	1300	1300	1300	1500	1500	2032

**Because of constant endeavour for improvement the above data may vary from those quoted above and are therefore subjected to confirmation.

CONSTRUCTION-----------------------------------------------------------Packaged vertical Tubeless Boiler.

PRESSURE CONTROLS-------------------------------------------------For controls of burner with set pressure limit. ..

BOILER FEED WATER PUMP-------------------------------------------Suitable for working at high pressure.

CONTROL PANEL---------------------------------------------------------Mounted on the boiler casing, comprising of all foreign components.

EFFICIENCY------------------------------------------------------------------Thermal efficiency 89% and fuel to steam efficiency 85% based on net calorific value of the fuel.

AFTER SALES SERVICE -------------------------------------------------All our steam boilers are backed by our nation wide team of service technicians. Service include commissioning, maintenance contracts,breakdown calls, boiler/burner servicing and routine maintenance. Spare of all make/ brand are available through our customer service department.

DESIGN-------------------------------------------------------------------As per Bangladesh Boiler Regulation. .................................

BOILER BODY---------------------------------------------------------Imported Boiler Grade Steel and pipe. .............................

OPERATION------------------------------------------------------------Fully automatic control.

WATER LEVEL CONTROLS---------------------------------------High/Low level control for feed water pump operation and external low level for burner cut off.

BURNER-----------------------------------------------------------------Complete packeged burner for on/off operation.

INSULATION AND FINISHING-----------------------------------The boiler shall be insulated with 50mm thick rockwool and claded with painted powder coated metallic sheet.

SAFETY------------------------------------------------------------------Against over pressure, low water level, no air flow to burner and power failure.

The waterside openings are located in the most effective positions. The lower handholds offer far better access for both cleanout and inspection.
These more functional locations avoid the obstructing handhole “tunnels” used by our competitors.
The top opening offers a strategic view of the furnace crown sheet.

The illustration beside left show the progression of our gas paths around the circumference of the boiler shell

Capacity to handle swing and spike loads-quick recovery quick response.
The large steam-release surface is calmer, reducing carry over of unevaporated water.
The resulting driver steam also reduces system scaling.
In addition, dry steam helps to eliminate unnecessary extra condensate. Energy and fuel are saved. Longer life results.

Heat is forced down, with the fire whirling and spinning against its natural flow. This pattern enhances recirculation, mixing and heat transfer, driving more energy into the water for greater fuel-to steam efficiency.

Cooler furnace gases are located at the bottom of the vessel where scale is most likely to occur. Baking of scale is alleviated.

The furnace crown is water cooled, eliminating troublesome refractory breakdown inherent in units of inferior design.
No fire tubes, water coils or “in the fire” mud rings to burnout.

Fireside fin access in top and bottom.
Access opening above feedwater intel for easy cleaning.
No heavy doors or covers to complicate service procedures.

Electrical components are located away from the floor, helping eliminate the possibility of water coming in contact with electricity.
Factory tested & checked for optimum operating efficiency.
All models subjected to 4 stage inspection by Bangladesh Boiler Inspecting authority during manufacture.

Unit is skid mounted for easy handling.
Factory wired with wiring schematic included in the manual
Efficient and space saving layout.

The gases leaving furnace are diverted 360 degree & travel around outer shell through fins passages to the stack out let.
Heat transfers evenly to the fins and boiler shell with steam space (Causing dry steam) eliminating the metal stress due to uneven heat transfer common in other designs.

The MEL boiler is available in a complete package with an optional compact skid-mouted feedwater system for a finished wired and piped, ready to fire.